Object-Oriented Programming · Question 27 · Hard
What is the output of the following Java code?
static void m(long x) { System.out.println("long"); }
static void m(Integer x) { System.out.println("Integer"); }
// in main:
m(5);- Integer
- Compilation error: ambiguous call
- ClassCastException at runtime
- long
Answer and explanation
Answer: D. long
Explanation: Java resolves overloads in phases: it first looks for a match using only widening, without boxing. int → long widening matches m(long), so it is chosen before boxing to Integer is even considered.
Previous: A House is made of Rooms, and the Rooms cannot exist without the House: when… · Next: What is the output of the following C++ program?
Practise object-oriented programming
Try a fresh set of object-oriented programming questions with an explanation after every answer, free and without signing up: Object-Oriented Programming practice. Or sit a full placement mock test.
More object-oriented programming questions
- Which SOLID principle says a class should have only one reason to change?
- Which design pattern ensures that a class has only one instance and provides a…
- A House is made of Rooms, and the Rooms cannot exist without the House: when…
- What is the output of the following C++ program?
- What is the output of the following Python code?
- What is the output of the following Java code?
More technical & programming practice
DBMS · SQL · Operating Systems · Computer Networks · Software Engineering · Cloud & DevOps · GenAI Basics · Pseudo-code
LogicWiz Exams home · All practice topics · Placement mock tests · Daily 10 challenge